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Allow better control over splitter position on resize

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Add an event which can be handled by the application to determine the
splitter position when the splitter window itself is resized.

This can be used to e.g. preserve the splitter at the given proportion
of the window (and not just in the middle, as it would be already
possible by using gravity 0.5).

Closes #22035.
This commit is contained in:
Gerhard Gruber
2022-01-20 23:12:52 +01:00
committed by Vadim Zeitlin
parent 8f58562fea
commit 1533026945
4 changed files with 129 additions and 10 deletions
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48
include/wx/generic/splitter.h
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@@ -323,9 +323,13 @@ public:
{
SetEventObject(splitter);
if (splitter) m_id = splitter->GetId();
m_data.resize.oldSize = 0;
m_data.resize.newSize = 0;
}
wxSplitterEvent(const wxSplitterEvent& event)
: wxNotifyEvent(event), m_data(event.m_data) { }
: wxNotifyEvent(event), m_data(event.m_data)
{ }
// SASH_POS_CHANGED methods
@@ -334,17 +338,41 @@ public:
void SetSashPosition(int pos)
{
wxASSERT( GetEventType() == wxEVT_SPLITTER_SASH_POS_CHANGED
|| GetEventType() == wxEVT_SPLITTER_SASH_POS_CHANGING);
|| GetEventType() == wxEVT_SPLITTER_SASH_POS_CHANGING
|| GetEventType() == wxEVT_SPLITTER_SASH_POS_RESIZE);
m_data.pos = pos;
m_data.resize.pos = pos;
}
int GetSashPosition() const
{
wxASSERT( GetEventType() == wxEVT_SPLITTER_SASH_POS_CHANGED
|| GetEventType() == wxEVT_SPLITTER_SASH_POS_CHANGING);
|| GetEventType() == wxEVT_SPLITTER_SASH_POS_CHANGING
|| GetEventType() == wxEVT_SPLITTER_SASH_POS_RESIZE);
return m_data.pos;
return m_data.resize.pos;
}
void SetSize(int oldSize, int newSize)
{
wxASSERT(GetEventType() == wxEVT_SPLITTER_SASH_POS_RESIZE);
m_data.resize.oldSize = oldSize;
m_data.resize.newSize = newSize;
}
int GetOldSize() const
{
wxASSERT(GetEventType() == wxEVT_SPLITTER_SASH_POS_RESIZE);
return m_data.resize.oldSize;
}
int GetNewSize() const
{
wxASSERT(GetEventType() == wxEVT_SPLITTER_SASH_POS_RESIZE);
return m_data.resize.newSize;
}
// UNSPLIT event methods
@@ -378,7 +406,12 @@ private:
// data for the different types of event
union
{
int pos; // position for SASH_POS_CHANGED event
struct
{
int pos; // position for SASH_POS_* events
int oldSize; // window size for SASH_POS_UPDATE event
int newSize; // window size for SASH_POS_UPDATE event
} resize;
wxWindow *win; // window being removed for UNSPLIT event
struct
{
@@ -403,6 +436,9 @@ typedef void (wxEvtHandler::*wxSplitterEventFunction)(wxSplitterEvent&);
#define EVT_SPLITTER_SASH_POS_CHANGING(id, fn) \
wx__DECLARE_SPLITTEREVT(SASH_POS_CHANGING, id, fn)
#define EVT_SPLITTER_SASH_POS_RESIZE(id, fn) \
wx__DECLARE_SPLITTEREVT(SASH_POS_UPDATE, id, fn)
#define EVT_SPLITTER_DCLICK(id, fn) \
wx__DECLARE_SPLITTEREVT(DOUBLECLICKED, id, fn)